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Analysis of the mechanism of effects of habitual exercise on cognitive dysfunction induced by amyloid beta oligomers

Research Project

Project/Area Number 19K11362
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 59010:Rehabilitation science-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

OCHIISHI TOMOYO  国立研究開発法人産業技術総合研究所, 生命工学領域, 主任研究員 (30356729)

Co-Investigator(Kenkyū-buntansha) 清末 和之  国立研究開発法人産業技術総合研究所, 生命工学領域, 研究グループ長 (50356903)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsアルツハイマー病 / アミロイドβタンパク質 / トランスジェニックマウス / オリゴマー / シナプス / 運動 / 認知機能 / 習慣的運動 / GFP / 行動解析
Outline of Research at the Start

ヒトは加齢とともに記憶力や学習効率が低下するが、運動によって高齢者の認知機能が改善されることはよく知られている。アルツハイマー病(AD)患者でもこれは例外ではないことから、薬による治療法が未だ確立しない中、習慣的な運動は新たな治療的介入の一環として注目を集めている。ADにおいて神経伝達機能の低下はアミロイドβタンパク質(Aβ)のオリゴマーによって引き起こされることが示唆されている。本研究は細胞内のAβオリゴマーの機能解析に最適な新規ADモデルマウスを用いて、Aβオリゴマーが引き起こす認知機能障害が運動によってどう変化するのか、またその変化を引き起こす生体内の因子を探索しその作用機構を解明する。

Outline of Final Research Achievements

It is well known that habitual exercise improves cognitive function in the elderly. Therefore, habitual exercise is attracting attention as a part of prevention against the onset of AD or as a new therapeutic intervention. However, the mechanism by which habitual exercise can improve the efficiency of synaptic transmission is unknown. Recently it suggested that oligomers of intracellular amyloid β (Aβ) are strongly cytotoxic, and play crucial roles in the cognitive function in AD. To investigate the effects of the voluntary exercise loading in early stage of AD, we used Aβ-GFP transgenic mouse that express fusion protein of Aβ and GFP that consisting of Aβ oligomers inside neurons. After 2 months of voluntary exercise loading to this mouse with a running wheel, the memory deficits were significantly improved. In addition, a comprehensive DNA microarray analysis of genes whose expression fluctuated before and after exercise revealed changes in synaptic-related proteins.

Academic Significance and Societal Importance of the Research Achievements

Aβオリゴマーを神経細胞内にのみ発現するAβ-GFPマウスは重篤なアルツハイマー病(AD)の病理学的所見を示さないが、生後2-3ヶ月齢で認知機能が低下することから軽度認知障害(MCI)のモデルとして使用できる。このモデルマウスを用いた習慣的な運動による、認知機能改善効果の解析系はMCIや発症初期のAD患者において運動の効果のメカニズムについて新たな知見をもたらすことが可能である。また、AD治療の非薬物的介入のみでなく、運動による効果を高める物質等、薬物的治療法の開発にも繋がることが期待される。高齢化社会において、医療費や介護の問題などの社会問題解決に向けて、発症予防という観点からも意義がある

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2021 2020 2019 Other

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (2 results)

  • [Journal Article] Mulberry fruit extract alleviates the intracellular amyloid‐β oligomer‐induced cognitive disturbance and oxidative stress in Alzheimer’s disease model mice2021

    • Author(s)
      Ochiishi Tomoyo、Kaku Masami、Kajsongkram Tanwarat、Thisayakorn Krittiya
    • Journal Title

      Genes to Cells

      Volume: 26 Issue: 11 Pages: 861-873

    • DOI

      10.1111/gtc.12889

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] New Alzheimer’s disease model mouse specialized for analyzing the function and toxicity of intraneuronal Amyloid β oligomers2019

    • Author(s)
      Ochiishi Tomoyo、Kaku Masami、Kiyosue Kazuyuki、Doi Motomichi、Urabe Takao、Hattori Nobutaka、Shimura Hideki、Ebihara Tatsuhiko
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 17368-17368

    • DOI

      10.1038/s41598-019-53415-8

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Mulberry fruit extract alleviates cognitive dysfunction in a mouse model of Alzheimer's disease expressing amyloid β oligomers only in neurons.2021

    • Author(s)
      落石 知世、角 正美、Kajsongkram Tanwarat、Thisayakorn Krittiya
    • Organizer
      第44回日本神経科学学会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The cognitive disturbances and oxidative stress that induced by the intracellular amyloid β oligomer is alleviated by the extract of mulberry fruits.2020

    • Author(s)
      落石知世、角正美、Tanwarat Kajsongkram、Krittiya Thisayakorn
    • Organizer
      第43回日本神経科学大会
    • Related Report
      2020 Research-status Report
  • [Presentation] A new Alzheimer's disease model mouse for amyloid β oligomer analyzes2019

    • Author(s)
      Ochiishi Tomoyo
    • Organizer
      XXVII Annual meeting of Indian Academy of Neuroscience
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Characteristic feature of new Alzheimer’s disease model mouse that expressing amyloid β oligomer intraneuronally2019

    • Author(s)
      Tomoyo Ochiishi, Masami Kaku, Kazuyuki Kiyosue, Motomichi Doi, Tatsuhiko Ebihara.
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Research-status Report
  • [Remarks] 産総研公式HP

    • URL

      https://www.aist.go.jp/aist_j/press_release/pr2019/pr20191122/pr20191122.html

    • Related Report
      2019 Research-status Report
  • [Remarks] 産総研公式HP(バイオメディカル)

    • URL

      https://unit.aist.go.jp/bmd/

    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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